lightnvm: pblk: guarantee line integrity on reads

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When a line is recycled during garbage collection, reads can still be
issued to the line. If the line is freed in the middle of this process,
data corruption might occur.

This patch guarantees that lines are not freed in the middle of reads
that target them (lines). Specifically, we use the existing line
reference to decide when a line is eligible for being freed after the
recycle process.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Javier González 2017-10-13 14:46:23 +02:00 • committed by Jens Axboe

parent a4809fee4e

commit 7bd4d370db

4 changed files with 118 additions and 25 deletions

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56

drivers/lightnvm/pblk-core.c

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14

drivers/lightnvm/pblk-init.c

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71

drivers/lightnvm/pblk-read.c

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2

drivers/lightnvm/pblk.h

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